ORBIT DETERMINATION SYSTEMS AND METHOD BASED ON NORAD TWO-LINE ELEMENTS

摘要

PURPOSE: A NORAD TLE(North American Aerospace Defense Command Two-line Elements) data-based orbit determination system and a method thereof are provided to obtain high precision of position information by utilizing NORAD TLE data receiving from a JSPOC(Joint Space Operations Center) as pseudo measurement data. CONSTITUTION: A NORAD TLE data-based orbit determination system comprises a TLE preprocessing part(100), an orbit determining part(200), and a position information output part(300). The TLE preprocessing part propagates NORAD data to an SGP-based orbit propagator to obtain position data on an ECI(Earth-Centered Inertial) coordinate system; converts the position data on the ECI coordinate system to position data on an ECEF(Earth-Centered-Earth-Fixed) coordinate system; and converts the converted position data on the EDEF coordinate system to PCE format position data. The orbit determining part determines information on the position of an orbit determining target through a batch processing technique by using the PCE format position data as pseudo measurement data. The position information output part converts the information on the position of the orbit determining target to a preset data format and outputs the data. [Reference numerals] (100) TLE preprocessing part; (200) Orbit determining part; (300) Position information output part